<?php
/**
 * @author     Riccardo Zorn <support@fasterjoomla.com>
 * @date       23.02.2014
 * @copyright  Copyright (C) 2008 - 2014 fasterjoomla.com . All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

defined('_JEXEC') or die('Restricted access');

// Include the rule base class
require_once JPATH_COMPONENT_ADMINISTRATOR . '/models/rule.php';

/**
 * JedcheckerRulesFramework
 *
 * @since  2014-02-23
 * Attempts to identify deprecated code, unsafe code, leftover stuff
 */
class JedcheckerRulesFramework extends JEDcheckerRule
{
	/**
	 * The formal ID of this rule. For example: SE1.
	 *
	 * @var    string
	 */
	protected $id = 'Framework';

	/**
	 * The title or caption of this rule.
	 *
	 * @var    string
	 */
	protected $title = 'COM_JEDCHECKER_RULE_FRAMEWORK';

	/**
	 * The description of this rule.
	 *
	 * @var    string
	 */
	protected $description = 'COM_JEDCHECKER_RULE_FRAMEWORK_DESC';

	protected $tests = false;

	protected $leftover_folders;

	/**
	 * Initiates the file search and check
	 *
	 * @return    void
	 */
	public function check()
	{
		$files = JFolder::files($this->basedir, '.php$', true, true);
		$this->leftover_folders = explode(',', $this->params->get('leftover_folders'));

		foreach ($files as $file)
		{
			if (!$this->excludeResource($file))
			{
				// Process the file
				if ($this->find($file))
				{
					// Error messages are set by find() based on the errors found.
				}
			}
		}
	}

	/**
	 * Check if the given resourse is part
	 *
	 * @param   string  $file  The file name to test
	 *
	 * @return   boolean
	 */
	private function excludeResource($file)
	{
		// Warn about code versioning files included
		$result = false;

		foreach ($this->leftover_folders as $leftover_folder)
		{
			if (strpos($file, $leftover_folder) !== false)
			{
				$error_message = JText::_("COM_JEDCHECKER_ERROR_FRAMEWORK_GIT") . ":";
				$this->report->addWarning($file, $error_message, 0);
				$result = true;
			}
		}

		return $result;
	}

	/**
	 * reads a file and searches for any function defined in the params
	 *
	 * @param   string  $file  The file name
	 *
	 * @return    boolean            True if the statement was found, otherwise False.
	 */
	protected function find($file)
	{
		$content = (array) file($file);
		$result = false;

		foreach ($this->getTests() as $testObject)
		{
			if ($this->runTest($file, $content, $testObject))
			{
				$result = true;
			}
		}

		return $result;
	}

	/**
	 * runs tests and reports to the appropriate function if strings match.
	 *
	 * @param   string  $file        The file name
	 * @param   array  $content     The file content
	 * @param   object  $testObject  The test object generated by getTests()
	 *
	 * @return boolean
	 */
	private function runTest($file, $content, $testObject)
	{
		$error_count = 0;

		foreach ($content as $line_number => $line)
		{
			foreach ($testObject->tests AS $singleTest)
			{
				if (stripos($line, $singleTest) !== false)
				{
					$line = str_ireplace($singleTest, '<b>' . $singleTest . '</b>', $line);
					$error_message = JText::_('COM_JEDCHECKER_ERROR_FRAMEWORK_' . strtoupper($testObject->group)) . ':<pre>' . $line . '</pre>';

					switch ($testObject->kind)
					{
						case 'error':$this->report->addError($file, $error_message, $line_number);
							break;
						case 'warning':$this->report->addWarning($file, $error_message, $line_number);
							break;
						case 'compatibility':$this->report->addCompat($file, $error_message, $line_number);
							break;
						default:
							// Case 'notice':
							$this->report->addInfo($file, $error_message, $line_number);
							break;
					}
				}
				// If you scored 10 errors on a single file, that's enough for now.
				if ($error_count > 10)
				{
					return true;
				}
			}
		}

		return $error_count > 0;
	}

	/**
	 * Lazyloads the tests from the framework.ini params.
	 * The whole structure depends on the file. The vars
	 * error_groups, warning_groups, notice_groups, compatibility_groups
	 * serve as lists of other rules, which are grouped and show a different error message per rule.
	 * Please note: if you want to add more rules, simply do so in the .ini file
	 * BUT MAKE SURE that you add the relevant key to the translation files:
	 * 		COM_JEDCHECKER_ERROR_NOFRAMEWOR_SOMEKEY
	 *
	 * @return boolean
	 */
	private function getTests()
	{
		if (!$this->tests)
		{
			// Build the test array. Please read the comments in the framework.ini file
			$this->tests = array();
			$testNames = array('error','warning','notice','compatibility');

			foreach ($testNames as $test)
			{
				foreach ( explode(",", $this->params->get($test . '_groups')) as $group)
				{
					$newTest = new stdClass;
					$newTest->group = $group;
					$newTest->kind = $test;
					$newTest->tests = explode(",", $this->params->get($group));
					$this->tests[] = $newTest;
				}
			}
		}

		return $this->tests;
	}
}